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Phương án duy nhất : Cứ ib thẳng CTV nhờ xoá hộ chứ để đấy 10 đời cũng vẫn thế thoi á :")
ko ! tui đã thực hiện lời nói , tuy ko đóng cửa phòng nhưng đã tắt điện trùm chăn xem phim kinh dị h mới xong
Flood is one of the most terrible kinds of natural disaster which hurts or even kills people and animals. Floods can also damage houses, factories, public places, etc. Floods can be caused by a variety of factors, such as heavy rainfall, storm surges, or the overflow of rivers and lakes. When floods occur, they can inundate homes, businesses, and farmland, leading to significant economic losses and disruption of daily life. The impact of floods in Vietnam has been significant, with millions of people affected and billions of dollars in damage caused. There are some efforts to minimize floods. First, we must not cut down the trees in the forest illegally, because it can cause many disasters for human beings, one of which is flood. Second, We should plant any kind of trees in our house, in a barren area or on the side of the road, so the water can be absorbed easily by the root of the plants. To mitigate the impact of floods, it is important to invest in disaster preparedness and response measures. This can include early warning systems, flood-resistant infrastructure, and emergency response plans. Floods are natural disasters that can have significant social, economic, and environmental consequences. By taking proactive steps to mitigate their impact, we can help to protect communities and ensure a more resilient future.
\(R_N=R_b+R_1=2,5+1=3,5\Omega\)
\(I_1=I_m=\dfrac{\xi}{R_N+r}=\dfrac{12}{3,5+0,5}=3A\)
\(P_1=R_1\cdot I_1^2=1\cdot3^2=9W\)
\(t=16'5s=965s\)
Bạc có \(A=108đvC;n=1\)
\(m=\dfrac{1}{F}\cdot\dfrac{A}{n}\cdot t=\dfrac{1}{96494}\cdot\dfrac{108}{1}\cdot965=1,08kg\)
\(H=\dfrac{R_N}{r+R_N}=\dfrac{3,5}{0,5+3,5}=87,5\%\)
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